bugfix: osgVolume::ScalarProperty clone crash
bugfix: osgVolume::ScalarProperty clone crash

openscenegraph/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,scrawl/osg,marchelbling/osg,openscenegraph/osg,jtorresfabra/osg,marchelbling/osg,scrawl/osg,jtorresfabra/osg,jtorresfabra/osg,marchelbling/osg,marchelbling/osg,openscenegraph/osg,scrawl/osg